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df2069ac CY |
1 | /* |
2 | * mtu3_gadget.c - MediaTek usb3 DRD peripheral support | |
3 | * | |
4 | * Copyright (C) 2016 MediaTek Inc. | |
5 | * | |
6 | * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> | |
7 | * | |
8 | * This software is licensed under the terms of the GNU General Public | |
9 | * License version 2, as published by the Free Software Foundation, and | |
10 | * may be copied, distributed, and modified under those terms. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include "mtu3.h" | |
20 | ||
21 | void mtu3_req_complete(struct mtu3_ep *mep, | |
22 | struct usb_request *req, int status) | |
23 | __releases(mep->mtu->lock) | |
24 | __acquires(mep->mtu->lock) | |
25 | { | |
26 | struct mtu3_request *mreq; | |
27 | struct mtu3 *mtu; | |
28 | int busy = mep->busy; | |
29 | ||
30 | mreq = to_mtu3_request(req); | |
31 | list_del(&mreq->list); | |
32 | if (mreq->request.status == -EINPROGRESS) | |
33 | mreq->request.status = status; | |
34 | ||
35 | mtu = mreq->mtu; | |
36 | mep->busy = 1; | |
37 | spin_unlock(&mtu->lock); | |
38 | ||
39 | /* ep0 makes use of PIO, needn't unmap it */ | |
40 | if (mep->epnum) | |
41 | usb_gadget_unmap_request(&mtu->g, req, mep->is_in); | |
42 | ||
43 | dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", mep->name, | |
44 | req, req->status, mreq->request.actual, mreq->request.length); | |
45 | ||
46 | usb_gadget_giveback_request(&mep->ep, &mreq->request); | |
47 | ||
48 | spin_lock(&mtu->lock); | |
49 | mep->busy = busy; | |
50 | } | |
51 | ||
52 | static void nuke(struct mtu3_ep *mep, const int status) | |
53 | { | |
54 | struct mtu3_request *mreq = NULL; | |
55 | ||
56 | mep->busy = 1; | |
57 | if (list_empty(&mep->req_list)) | |
58 | return; | |
59 | ||
60 | dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); | |
61 | ||
62 | /* exclude EP0 */ | |
63 | if (mep->epnum) | |
64 | mtu3_qmu_flush(mep); | |
65 | ||
66 | while (!list_empty(&mep->req_list)) { | |
67 | mreq = list_first_entry(&mep->req_list, | |
68 | struct mtu3_request, list); | |
69 | mtu3_req_complete(mep, &mreq->request, status); | |
70 | } | |
71 | } | |
72 | ||
73 | static int mtu3_ep_enable(struct mtu3_ep *mep) | |
74 | { | |
75 | const struct usb_endpoint_descriptor *desc; | |
a29de31b | 76 | const struct usb_ss_ep_comp_descriptor *comp_desc; |
df2069ac CY |
77 | struct mtu3 *mtu = mep->mtu; |
78 | u32 interval = 0; | |
79 | u32 mult = 0; | |
80 | u32 burst = 0; | |
81 | int max_packet; | |
82 | int ret; | |
83 | ||
84 | desc = mep->desc; | |
a29de31b | 85 | comp_desc = mep->comp_desc; |
df2069ac CY |
86 | mep->type = usb_endpoint_type(desc); |
87 | max_packet = usb_endpoint_maxp(desc); | |
88 | mep->maxp = max_packet & GENMASK(10, 0); | |
89 | ||
90 | switch (mtu->g.speed) { | |
a29de31b CY |
91 | case USB_SPEED_SUPER: |
92 | if (usb_endpoint_xfer_int(desc) || | |
93 | usb_endpoint_xfer_isoc(desc)) { | |
94 | interval = desc->bInterval; | |
95 | interval = clamp_val(interval, 1, 16) - 1; | |
96 | if (usb_endpoint_xfer_isoc(desc) && comp_desc) | |
97 | mult = comp_desc->bmAttributes; | |
98 | } | |
99 | if (comp_desc) | |
100 | burst = comp_desc->bMaxBurst; | |
101 | ||
102 | break; | |
df2069ac CY |
103 | case USB_SPEED_HIGH: |
104 | if (usb_endpoint_xfer_isoc(desc) || | |
105 | usb_endpoint_xfer_int(desc)) { | |
106 | interval = desc->bInterval; | |
107 | interval = clamp_val(interval, 1, 16) - 1; | |
108 | burst = (max_packet & GENMASK(12, 11)) >> 11; | |
109 | } | |
110 | break; | |
111 | default: | |
112 | break; /*others are ignored */ | |
113 | } | |
114 | ||
115 | dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", | |
116 | __func__, mep->maxp, interval, burst, mult); | |
117 | ||
118 | mep->ep.maxpacket = mep->maxp; | |
119 | mep->ep.desc = desc; | |
a29de31b | 120 | mep->ep.comp_desc = comp_desc; |
df2069ac CY |
121 | |
122 | /* slot mainly affects bulk/isoc transfer, so ignore int */ | |
123 | mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; | |
124 | ||
125 | ret = mtu3_config_ep(mtu, mep, interval, burst, mult); | |
126 | if (ret < 0) | |
127 | return ret; | |
128 | ||
129 | ret = mtu3_gpd_ring_alloc(mep); | |
130 | if (ret < 0) { | |
131 | mtu3_deconfig_ep(mtu, mep); | |
132 | return ret; | |
133 | } | |
134 | ||
135 | mtu3_qmu_start(mep); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int mtu3_ep_disable(struct mtu3_ep *mep) | |
141 | { | |
142 | struct mtu3 *mtu = mep->mtu; | |
143 | ||
144 | mtu3_qmu_stop(mep); | |
145 | ||
146 | /* abort all pending requests */ | |
147 | nuke(mep, -ESHUTDOWN); | |
148 | mtu3_deconfig_ep(mtu, mep); | |
149 | mtu3_gpd_ring_free(mep); | |
150 | ||
151 | mep->desc = NULL; | |
152 | mep->ep.desc = NULL; | |
a29de31b | 153 | mep->comp_desc = NULL; |
df2069ac CY |
154 | mep->type = 0; |
155 | mep->flags = 0; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static int mtu3_gadget_ep_enable(struct usb_ep *ep, | |
161 | const struct usb_endpoint_descriptor *desc) | |
162 | { | |
163 | struct mtu3_ep *mep; | |
164 | struct mtu3 *mtu; | |
165 | unsigned long flags; | |
166 | int ret = -EINVAL; | |
167 | ||
168 | if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { | |
169 | pr_debug("%s invalid parameters\n", __func__); | |
170 | return -EINVAL; | |
171 | } | |
172 | ||
173 | if (!desc->wMaxPacketSize) { | |
174 | pr_debug("%s missing wMaxPacketSize\n", __func__); | |
175 | return -EINVAL; | |
176 | } | |
177 | mep = to_mtu3_ep(ep); | |
178 | mtu = mep->mtu; | |
179 | ||
180 | /* check ep number and direction against endpoint */ | |
181 | if (usb_endpoint_num(desc) != mep->epnum) | |
182 | return -EINVAL; | |
183 | ||
184 | if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) | |
185 | return -EINVAL; | |
186 | ||
187 | dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); | |
188 | ||
189 | if (mep->flags & MTU3_EP_ENABLED) { | |
190 | dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", | |
191 | mep->name); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | spin_lock_irqsave(&mtu->lock, flags); | |
196 | mep->desc = desc; | |
a29de31b | 197 | mep->comp_desc = ep->comp_desc; |
df2069ac CY |
198 | |
199 | ret = mtu3_ep_enable(mep); | |
200 | if (ret) | |
201 | goto error; | |
202 | ||
203 | mep->busy = 0; | |
204 | mep->wedged = 0; | |
205 | mep->flags |= MTU3_EP_ENABLED; | |
206 | mtu->active_ep++; | |
207 | ||
208 | error: | |
209 | spin_unlock_irqrestore(&mtu->lock, flags); | |
210 | ||
211 | dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); | |
212 | ||
213 | return ret; | |
214 | } | |
215 | ||
216 | static int mtu3_gadget_ep_disable(struct usb_ep *ep) | |
217 | { | |
218 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
219 | struct mtu3 *mtu = mep->mtu; | |
220 | unsigned long flags; | |
221 | ||
222 | dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); | |
223 | ||
224 | if (!(mep->flags & MTU3_EP_ENABLED)) { | |
225 | dev_warn(mtu->dev, "%s is already disabled\n", mep->name); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | spin_lock_irqsave(&mtu->lock, flags); | |
230 | mtu3_ep_disable(mep); | |
231 | mep->flags &= ~MTU3_EP_ENABLED; | |
232 | mtu->active_ep--; | |
233 | spin_unlock_irqrestore(&(mtu->lock), flags); | |
234 | ||
235 | dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", | |
236 | __func__, mtu->active_ep, mtu->is_active); | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
242 | { | |
243 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
244 | struct mtu3_request *mreq; | |
245 | ||
246 | mreq = kzalloc(sizeof(*mreq), gfp_flags); | |
247 | if (!mreq) | |
248 | return NULL; | |
249 | ||
250 | mreq->request.dma = DMA_ADDR_INVALID; | |
251 | mreq->epnum = mep->epnum; | |
252 | mreq->mep = mep; | |
253 | ||
254 | return &mreq->request; | |
255 | } | |
256 | ||
257 | void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) | |
258 | { | |
259 | kfree(to_mtu3_request(req)); | |
260 | } | |
261 | ||
262 | static int mtu3_gadget_queue(struct usb_ep *ep, | |
263 | struct usb_request *req, gfp_t gfp_flags) | |
264 | { | |
265 | struct mtu3_ep *mep; | |
266 | struct mtu3_request *mreq; | |
267 | struct mtu3 *mtu; | |
268 | unsigned long flags; | |
269 | int ret = 0; | |
270 | ||
271 | if (!ep || !req) | |
272 | return -EINVAL; | |
273 | ||
274 | if (!req->buf) | |
275 | return -ENODATA; | |
276 | ||
277 | mep = to_mtu3_ep(ep); | |
278 | mtu = mep->mtu; | |
279 | mreq = to_mtu3_request(req); | |
280 | mreq->mtu = mtu; | |
281 | ||
282 | if (mreq->mep != mep) | |
283 | return -EINVAL; | |
284 | ||
285 | dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", | |
286 | __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, | |
287 | mreq, ep->maxpacket, mreq->request.length); | |
288 | ||
289 | if (req->length > GPD_BUF_SIZE) { | |
290 | dev_warn(mtu->dev, | |
291 | "req length > supported MAX:%d requested:%d\n", | |
292 | GPD_BUF_SIZE, req->length); | |
293 | return -EOPNOTSUPP; | |
294 | } | |
295 | ||
296 | /* don't queue if the ep is down */ | |
297 | if (!mep->desc) { | |
298 | dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", | |
299 | req, ep->name); | |
300 | return -ESHUTDOWN; | |
301 | } | |
302 | ||
303 | mreq->request.actual = 0; | |
304 | mreq->request.status = -EINPROGRESS; | |
305 | ||
306 | ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); | |
307 | if (ret) { | |
308 | dev_err(mtu->dev, "dma mapping failed\n"); | |
309 | return ret; | |
310 | } | |
311 | ||
312 | spin_lock_irqsave(&mtu->lock, flags); | |
313 | ||
314 | if (mtu3_prepare_transfer(mep)) { | |
315 | ret = -EAGAIN; | |
316 | goto error; | |
317 | } | |
318 | ||
319 | list_add_tail(&mreq->list, &mep->req_list); | |
320 | mtu3_insert_gpd(mep, mreq); | |
321 | mtu3_qmu_resume(mep); | |
322 | ||
323 | error: | |
324 | spin_unlock_irqrestore(&mtu->lock, flags); | |
325 | ||
326 | return ret; | |
327 | } | |
328 | ||
329 | static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) | |
330 | { | |
331 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
332 | struct mtu3_request *mreq = to_mtu3_request(req); | |
333 | struct mtu3_request *r; | |
334 | unsigned long flags; | |
335 | int ret = 0; | |
336 | struct mtu3 *mtu = mep->mtu; | |
337 | ||
338 | if (!ep || !req || mreq->mep != mep) | |
339 | return -EINVAL; | |
340 | ||
341 | dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); | |
342 | ||
343 | spin_lock_irqsave(&mtu->lock, flags); | |
344 | ||
345 | list_for_each_entry(r, &mep->req_list, list) { | |
346 | if (r == mreq) | |
347 | break; | |
348 | } | |
349 | if (r != mreq) { | |
350 | dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); | |
351 | ret = -EINVAL; | |
352 | goto done; | |
353 | } | |
354 | ||
355 | mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ | |
356 | mtu3_req_complete(mep, req, -ECONNRESET); | |
357 | mtu3_qmu_start(mep); | |
358 | ||
359 | done: | |
360 | spin_unlock_irqrestore(&mtu->lock, flags); | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Set or clear the halt bit of an EP. | |
367 | * A halted EP won't TX/RX any data but will queue requests. | |
368 | */ | |
369 | static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) | |
370 | { | |
371 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
372 | struct mtu3 *mtu = mep->mtu; | |
373 | struct mtu3_request *mreq; | |
374 | unsigned long flags; | |
375 | int ret = 0; | |
376 | ||
377 | if (!ep) | |
378 | return -EINVAL; | |
379 | ||
380 | dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); | |
381 | ||
382 | spin_lock_irqsave(&mtu->lock, flags); | |
383 | ||
384 | if (mep->type == USB_ENDPOINT_XFER_ISOC) { | |
385 | ret = -EINVAL; | |
386 | goto done; | |
387 | } | |
388 | ||
389 | mreq = next_request(mep); | |
390 | if (value) { | |
391 | /* | |
392 | * If there is not request for TX-EP, QMU will not transfer | |
393 | * data to TX-FIFO, so no need check whether TX-FIFO | |
394 | * holds bytes or not here | |
395 | */ | |
396 | if (mreq) { | |
397 | dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", | |
398 | ep->name); | |
399 | ret = -EAGAIN; | |
400 | goto done; | |
401 | } | |
402 | } else { | |
403 | mep->wedged = 0; | |
404 | } | |
405 | ||
406 | dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); | |
407 | ||
408 | mtu3_ep_stall_set(mep, value); | |
409 | ||
410 | done: | |
411 | spin_unlock_irqrestore(&mtu->lock, flags); | |
412 | ||
413 | return ret; | |
414 | } | |
415 | ||
416 | /* Sets the halt feature with the clear requests ignored */ | |
417 | static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) | |
418 | { | |
419 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
420 | ||
421 | if (!ep) | |
422 | return -EINVAL; | |
423 | ||
424 | mep->wedged = 1; | |
425 | ||
426 | return usb_ep_set_halt(ep); | |
427 | } | |
428 | ||
429 | static const struct usb_ep_ops mtu3_ep_ops = { | |
430 | .enable = mtu3_gadget_ep_enable, | |
431 | .disable = mtu3_gadget_ep_disable, | |
432 | .alloc_request = mtu3_alloc_request, | |
433 | .free_request = mtu3_free_request, | |
434 | .queue = mtu3_gadget_queue, | |
435 | .dequeue = mtu3_gadget_dequeue, | |
436 | .set_halt = mtu3_gadget_ep_set_halt, | |
437 | .set_wedge = mtu3_gadget_ep_set_wedge, | |
438 | }; | |
439 | ||
440 | static int mtu3_gadget_get_frame(struct usb_gadget *gadget) | |
441 | { | |
442 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
443 | ||
444 | return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); | |
445 | } | |
446 | ||
447 | static int mtu3_gadget_wakeup(struct usb_gadget *gadget) | |
448 | { | |
449 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
450 | unsigned long flags; | |
451 | ||
452 | dev_dbg(mtu->dev, "%s\n", __func__); | |
453 | ||
454 | /* remote wakeup feature is not enabled by host */ | |
455 | if (!mtu->may_wakeup) | |
456 | return -EOPNOTSUPP; | |
457 | ||
458 | spin_lock_irqsave(&mtu->lock, flags); | |
a29de31b CY |
459 | if (mtu->g.speed == USB_SPEED_SUPER) { |
460 | mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); | |
461 | } else { | |
462 | mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); | |
463 | spin_unlock_irqrestore(&mtu->lock, flags); | |
464 | usleep_range(10000, 11000); | |
465 | spin_lock_irqsave(&mtu->lock, flags); | |
466 | mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); | |
467 | } | |
df2069ac CY |
468 | spin_unlock_irqrestore(&mtu->lock, flags); |
469 | return 0; | |
470 | } | |
471 | ||
472 | static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, | |
473 | int is_selfpowered) | |
474 | { | |
475 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
476 | ||
477 | mtu->is_self_powered = !!is_selfpowered; | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) | |
482 | { | |
483 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
484 | unsigned long flags; | |
485 | ||
486 | dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, | |
487 | is_on ? "on" : "off", mtu->is_active ? "" : "in"); | |
488 | ||
489 | /* we'd rather not pullup unless the device is active. */ | |
490 | spin_lock_irqsave(&mtu->lock, flags); | |
491 | ||
492 | is_on = !!is_on; | |
493 | if (!mtu->is_active) { | |
494 | /* save it for mtu3_start() to process the request */ | |
495 | mtu->softconnect = is_on; | |
496 | } else if (is_on != mtu->softconnect) { | |
497 | mtu->softconnect = is_on; | |
a29de31b | 498 | mtu3_dev_on_off(mtu, is_on); |
df2069ac CY |
499 | } |
500 | ||
501 | spin_unlock_irqrestore(&mtu->lock, flags); | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static int mtu3_gadget_start(struct usb_gadget *gadget, | |
507 | struct usb_gadget_driver *driver) | |
508 | { | |
509 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
510 | unsigned long flags; | |
511 | ||
512 | if (mtu->gadget_driver) { | |
513 | dev_err(mtu->dev, "%s is already bound to %s\n", | |
514 | mtu->g.name, mtu->gadget_driver->driver.name); | |
515 | return -EBUSY; | |
516 | } | |
517 | ||
518 | dev_dbg(mtu->dev, "bind driver %s\n", driver->function); | |
519 | ||
520 | spin_lock_irqsave(&mtu->lock, flags); | |
521 | ||
522 | mtu->softconnect = 0; | |
523 | mtu->gadget_driver = driver; | |
524 | ||
d0ed062a CY |
525 | if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
526 | mtu3_start(mtu); | |
df2069ac CY |
527 | |
528 | spin_unlock_irqrestore(&mtu->lock, flags); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | static void stop_activity(struct mtu3 *mtu) | |
534 | { | |
535 | struct usb_gadget_driver *driver = mtu->gadget_driver; | |
536 | int i; | |
537 | ||
538 | /* don't disconnect if it's not connected */ | |
539 | if (mtu->g.speed == USB_SPEED_UNKNOWN) | |
540 | driver = NULL; | |
541 | else | |
542 | mtu->g.speed = USB_SPEED_UNKNOWN; | |
543 | ||
544 | /* deactivate the hardware */ | |
545 | if (mtu->softconnect) { | |
546 | mtu->softconnect = 0; | |
a29de31b | 547 | mtu3_dev_on_off(mtu, 0); |
df2069ac CY |
548 | } |
549 | ||
550 | /* | |
551 | * killing any outstanding requests will quiesce the driver; | |
552 | * then report disconnect | |
553 | */ | |
554 | nuke(mtu->ep0, -ESHUTDOWN); | |
555 | for (i = 1; i < mtu->num_eps; i++) { | |
556 | nuke(mtu->in_eps + i, -ESHUTDOWN); | |
557 | nuke(mtu->out_eps + i, -ESHUTDOWN); | |
558 | } | |
559 | ||
560 | if (driver) { | |
561 | spin_unlock(&mtu->lock); | |
562 | driver->disconnect(&mtu->g); | |
563 | spin_lock(&mtu->lock); | |
564 | } | |
565 | } | |
566 | ||
567 | static int mtu3_gadget_stop(struct usb_gadget *g) | |
568 | { | |
569 | struct mtu3 *mtu = gadget_to_mtu3(g); | |
570 | unsigned long flags; | |
571 | ||
572 | dev_dbg(mtu->dev, "%s\n", __func__); | |
573 | ||
574 | spin_lock_irqsave(&mtu->lock, flags); | |
575 | ||
576 | stop_activity(mtu); | |
577 | mtu->gadget_driver = NULL; | |
578 | ||
d0ed062a CY |
579 | if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
580 | mtu3_stop(mtu); | |
df2069ac CY |
581 | |
582 | spin_unlock_irqrestore(&mtu->lock, flags); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static const struct usb_gadget_ops mtu3_gadget_ops = { | |
588 | .get_frame = mtu3_gadget_get_frame, | |
589 | .wakeup = mtu3_gadget_wakeup, | |
590 | .set_selfpowered = mtu3_gadget_set_self_powered, | |
591 | .pullup = mtu3_gadget_pullup, | |
592 | .udc_start = mtu3_gadget_start, | |
593 | .udc_stop = mtu3_gadget_stop, | |
594 | }; | |
595 | ||
596 | static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep, | |
597 | u32 epnum, u32 is_in) | |
598 | { | |
599 | mep->epnum = epnum; | |
600 | mep->mtu = mtu; | |
601 | mep->is_in = is_in; | |
602 | ||
603 | INIT_LIST_HEAD(&mep->req_list); | |
604 | ||
605 | sprintf(mep->name, "ep%d%s", epnum, | |
606 | !epnum ? "" : (is_in ? "in" : "out")); | |
607 | ||
608 | mep->ep.name = mep->name; | |
609 | INIT_LIST_HEAD(&mep->ep.ep_list); | |
610 | ||
a29de31b | 611 | /* initialize maxpacket as SS */ |
df2069ac | 612 | if (!epnum) { |
a29de31b | 613 | usb_ep_set_maxpacket_limit(&mep->ep, 512); |
df2069ac CY |
614 | mep->ep.caps.type_control = true; |
615 | mep->ep.ops = &mtu3_ep0_ops; | |
616 | mtu->g.ep0 = &mep->ep; | |
617 | } else { | |
a29de31b | 618 | usb_ep_set_maxpacket_limit(&mep->ep, 1024); |
df2069ac CY |
619 | mep->ep.caps.type_iso = true; |
620 | mep->ep.caps.type_bulk = true; | |
621 | mep->ep.caps.type_int = true; | |
622 | mep->ep.ops = &mtu3_ep_ops; | |
623 | list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list); | |
624 | } | |
625 | ||
626 | dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name, | |
627 | mep->ep.maxpacket); | |
628 | ||
629 | if (!epnum) { | |
630 | mep->ep.caps.dir_in = true; | |
631 | mep->ep.caps.dir_out = true; | |
632 | } else if (is_in) { | |
633 | mep->ep.caps.dir_in = true; | |
634 | } else { | |
635 | mep->ep.caps.dir_out = true; | |
636 | } | |
637 | } | |
638 | ||
639 | static void mtu3_gadget_init_eps(struct mtu3 *mtu) | |
640 | { | |
641 | u8 epnum; | |
642 | ||
643 | /* initialize endpoint list just once */ | |
644 | INIT_LIST_HEAD(&(mtu->g.ep_list)); | |
645 | ||
646 | dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n", | |
647 | __func__, mtu->num_eps); | |
648 | ||
649 | init_hw_ep(mtu, mtu->ep0, 0, 0); | |
650 | for (epnum = 1; epnum < mtu->num_eps; epnum++) { | |
651 | init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1); | |
652 | init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0); | |
653 | } | |
654 | } | |
655 | ||
656 | int mtu3_gadget_setup(struct mtu3 *mtu) | |
657 | { | |
658 | int ret; | |
659 | ||
660 | mtu->g.ops = &mtu3_gadget_ops; | |
a29de31b | 661 | mtu->g.max_speed = mtu->max_speed; |
df2069ac CY |
662 | mtu->g.speed = USB_SPEED_UNKNOWN; |
663 | mtu->g.sg_supported = 0; | |
664 | mtu->g.name = MTU3_DRIVER_NAME; | |
665 | mtu->is_active = 0; | |
666 | ||
667 | mtu3_gadget_init_eps(mtu); | |
668 | ||
669 | ret = usb_add_gadget_udc(mtu->dev, &mtu->g); | |
670 | if (ret) { | |
671 | dev_err(mtu->dev, "failed to register udc\n"); | |
672 | return ret; | |
673 | } | |
674 | ||
675 | usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | void mtu3_gadget_cleanup(struct mtu3 *mtu) | |
681 | { | |
682 | usb_del_gadget_udc(&mtu->g); | |
683 | } | |
684 | ||
685 | void mtu3_gadget_resume(struct mtu3 *mtu) | |
686 | { | |
687 | dev_dbg(mtu->dev, "gadget RESUME\n"); | |
688 | if (mtu->gadget_driver && mtu->gadget_driver->resume) { | |
689 | spin_unlock(&mtu->lock); | |
690 | mtu->gadget_driver->resume(&mtu->g); | |
691 | spin_lock(&mtu->lock); | |
692 | } | |
693 | } | |
694 | ||
695 | /* called when SOF packets stop for 3+ msec or enters U3 */ | |
696 | void mtu3_gadget_suspend(struct mtu3 *mtu) | |
697 | { | |
698 | dev_dbg(mtu->dev, "gadget SUSPEND\n"); | |
699 | if (mtu->gadget_driver && mtu->gadget_driver->suspend) { | |
700 | spin_unlock(&mtu->lock); | |
701 | mtu->gadget_driver->suspend(&mtu->g); | |
702 | spin_lock(&mtu->lock); | |
703 | } | |
704 | } | |
705 | ||
706 | /* called when VBUS drops below session threshold, and in other cases */ | |
707 | void mtu3_gadget_disconnect(struct mtu3 *mtu) | |
708 | { | |
709 | dev_dbg(mtu->dev, "gadget DISCONNECT\n"); | |
710 | if (mtu->gadget_driver && mtu->gadget_driver->disconnect) { | |
711 | spin_unlock(&mtu->lock); | |
712 | mtu->gadget_driver->disconnect(&mtu->g); | |
713 | spin_lock(&mtu->lock); | |
714 | } | |
715 | ||
716 | usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); | |
717 | } | |
718 | ||
719 | void mtu3_gadget_reset(struct mtu3 *mtu) | |
720 | { | |
721 | dev_dbg(mtu->dev, "gadget RESET\n"); | |
722 | ||
723 | /* report disconnect, if we didn't flush EP state */ | |
724 | if (mtu->g.speed != USB_SPEED_UNKNOWN) | |
725 | mtu3_gadget_disconnect(mtu); | |
726 | ||
727 | mtu->address = 0; | |
728 | mtu->ep0_state = MU3D_EP0_STATE_SETUP; | |
729 | mtu->may_wakeup = 0; | |
730 | } |